Suspension Parts for 2004 YAMAHA YZ125 Motorbikes | Guaranteed Fitment

Discover suspension parts guaranteed to fit the 2004 YAMAHA YZ125. Every product in this category has been validated against year-specific fork and shock specifications to ensure true compatibility.
You’ll find fork components, shock parts, shims, upgrade kits, complete suspension systems, chassis components, and the tools and fluids required for accurate servicing - all aligned with the suspension setup of the 2004 YAMAHA YZ125.

Use this page as a reliable reference when maintaining, rebuilding, or upgrading your bike’s suspension.

Bike-Specific Suspension Specifications & Setup Information

CALCULATE SPRING RATES

This is a recommendation only please consult your manual

Ideal Fork Rate:

kg/mm ( N/mm)

Ideal Shock Rate:

kg/mm ( N/mm)

BIKE DETAILS

Stock Fork Spring Rate

0.4

Stock Shock Spring Rate

4.6

Bike Type

MX

Ideal Rider Weight

75 kg

Engine Specifications

2 Stroke Engine 125 cc

FORKS INFO

Fork Manufacturer

Fork Type: KYB USD 48 mm OD

Fork Dimensions

Compression Nut Torque: 48 in-lb (0.56 kgf-m)
Fork Travel: 300 mm

Fork Features

Twin Chamber Fork: No

Fork Oil

Fork Oil Weight: SAE 2.5
Fork Oil Level: 125 mm

Fork Spring Information

Standard Preload: 8 mm

SHOCKS INFO

Shock Manufacturer

Shock Type: KYB 46 mm ID

Shock Dimensions

Nitrogen Pressure: 142 psi
Shock Length (Eye to Eye): 494 mm
Shock Shaft Outer Diameter: 16 mm
Standard Sag: 103 mm
Shaft Nut Torque: 25 ft-lbs (34 NM)
Shock Oil: 2.5 Weight
Standard Preload: 8

Shock Features

Non-rebuildable: No

Fitment-Matched Suspension Parts by Category

FORK SEALS & BUSHES

14 Parts

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FORK COMPRESSION ADJUSTER ASSY

16 Parts

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SHOCK SEAL CASE PARTS

14 Parts

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SHOCK SHAFT PARTS

17 Parts

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SHOCK BODY PARTS

17 Parts

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SUSPENSION LOCKNUTS & BUSHES

23 Parts

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TOOLS & LUBRICANTS

36 Parts

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All Fitment-Matched Suspension Parts

Browse All 158 Products for YAMAHA YZ125 2004

16 x 12mm Shock Seal Head Bullet

Teknik Tools

16 x 12mm Shock Seal Head Bullet

Motorcycle Suspension Tools
(SKU: 93-025-00)

$19.95
6 In Stock

Shock Seal Head Brass Bullet 5Pc Kit

Techtool

Shock Seal Head Brass Bullet 5Pc Kit

12.5x10 | 14x12 | 16x12 | 18x12 | 18x16 mm
(SKU: 93-031-00)

$76.95
3 In Stock

Shock Seal Head Steel Bullet 4pc Kit

Techtool

Shock Seal Head Steel Bullet 4pc Kit

14x12 | 16x12 | 18x12 | 18x16 mm
(SKU: 93-031-01)

$69.95
13 In Stock

Techtool Fork Tube Tool & Cartridge Rod Holding Plate

Techtool

Techtool Fork Tube Tool & Cartridge Rod Holding Plate

For KYB, Showa & WP Twin or Open Chamber Forks
(SKU: 93-032-00)

$220.00
12 In Stock

Shock Bushing Driver Set

Techtool

Shock Bushing Driver Set

(SKU: 93-118-00)

$33.00
16 In Stock

Eibach EMS Moto Front Fork Spring Kit. 43.6 x 480 WP 48 Twin Chamber Bladder Fork 2007-2014

Eibach Suspension Technology

Eibach EMS Moto Front Fork Spring Kit. 43.6 x 480 WP 48 Twin Chamber Bladder Fork 2007-2014

Made in the USA (QS9000) or Germany (ISO16949)
(SKU: 969)

From $249.94

Spring Rate: 0.39 kg/mm

$249.94
1 In Stock

Spring Rate: 0.40 kg/mm

$249.94
Special Order

Spring Rate: 0.42 kg/mm

$249.94
Special Order

Spring Rate: 0.44 kg/mm

$249.94
Special Order

Spring Rate: 0.47 kg/mm

$249.94
3 In Stock

Spring Rate: 0.49 kg/mm

$249.94
2 In Stock

Spring Rate: 0.50 kg/mm

$249.94
2 In Stock

Spring Rate: 0.37 kg/mm

$249.94
1 In Stock

Spring Rate: 0.41 kg/mm

$249.94
1 In Stock

Spring Rate: 0.43 kg/mm

$249.94
Special Order

Spring Rate: 0.45 kg/mm

$249.94
Special Order

Spring Rate: 0.51 kg/mm

$249.94
9 In Stock

DRC Fork Seal Driver Set | Universal | 40-50mm

DRC Zeta Hardware

DRC Fork Seal Driver Set | Universal | 40-50mm

DRC Fork Seal Driver Tool Set
(SKU: D59-26-005)

$177.09
4 In Stock

DRC ENZO | Fork Bracket Holder | 20/22/25/26/27mm Axle Sizes

Enzo Racing

DRC ENZO | Fork Bracket Holder | 20/22/25/26/27mm Axle Sizes

Co-developed product with Enzo Racing
(SKU: ED59-37-240)

$65.00
10 In Stock

48mm KYB SKF Mud Scraper

SKF Sealing

48mm KYB SKF Mud Scraper

Removable Scraper
(SKU: KIT-MS48KM)

$66.00
1 In Stock

Krooztune KYB HIGH SPEED COMP PISTON

Krooztune

Krooztune KYB HIGH SPEED COMP PISTON

Proudly made in Australia
(SKU: KT-KYBHSCP)

$62.95
3 In Stock

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